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Low-Voltage Low-Power Controllable Preamplifier for Electret Microphones

Van der Woerd, AC; Serdijn, WA; (1993) Low-Voltage Low-Power Controllable Preamplifier for Electret Microphones. IEEE Journal of Solid-State Circuits , 28 (10) pp. 1052-1055. 10.1109/4.237521.

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Abstract

A low-voltage low-power analog controllable preamplifier for electret microphones is presented. It has been designed for a single supply voltage of 1.0 V, whereas its average power consumption amounts to some tens of microwatts. A dc current controls its gain directly into decibels. The design meets specifications (listed in Section I) concerning accuracy, bandwidth, noise properties, etc., suitable for most applications in portable telephone equipment, portable transceivers, hearing aids, etc. Much attention has been paid to the dynamic range of the input signal, noise, and offset properties. The circuit has been realized in a semi-custom IC process. Simulation and measurement data of the most important properties are presented. © 1993 IEEE

Type: Article
Title: Low-Voltage Low-Power Controllable Preamplifier for Electret Microphones
DOI: 10.1109/4.237521
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/1528257
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